﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal class DataPathEnumerator : ConversionEnumerator<RawDataItem, DataPath>
  {
    #region Constructor

    internal DataPathEnumerator( IAsyncEnumerator childEnumerator, IContextualConvertHelper<RawDataItem, DataPath> converterHelper )
      : base( childEnumerator )
    {
      if( converterHelper == null )
        throw new ArgumentNullException( "converterHelper" );

      m_converterHelper = converterHelper;
    }

    #endregion

    protected override DataPath Convert( DataSourceContext context, RawDataItem value )
    {
      return m_converterHelper.Convert( context, value );
    }

    protected override RawDataItem ConvertBack( DataSourceContext context, DataPath value )
    {
      return m_converterHelper.ConvertBack( context, value );
    }

    #region Private Fields

    private readonly IContextualConvertHelper<RawDataItem, DataPath> m_converterHelper;

    #endregion
  }
}
